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Mirror and laser beam angle please help

  1. Mar 24, 2008 #1
    Mirror and laser beam angle...please help!!!

    1. The problem statement, all variables and given/known data
    The mirror deflects a horizontal laser beam by θ=59°. What is the angle φ?


    2. Relevant equations



    3. The attempt at a solution
    I don't understand this. How am I supposed to figure out φ?
     
  2. jcsd
  3. Mar 24, 2008 #2

    tiny-tim

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    I assume φ is the angle of incidence.

    Have you drawn a diagram?

    What have you drawn … ? :smile:
     
  4. Mar 24, 2008 #3
    I have the beam being reflected with lines drawn the upper left and lower left
     
  5. Mar 24, 2008 #4

    tiny-tim

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    You haven't told us where you've put the 59º in, nor where you've marked φ.

    So … where are they?

    Anyway, how much are the upper left and lower left angles? :smile:
     
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